Cliff Hignet's answer to Trevor Finch's question

[Steve Evett <srevett@ag.gov>]

Cliff Hignett gave an interesting discussion on calibration in soils with
depth and location variable clay contents.  Cliff, do you have any papers
out on this since the Greacen et al. book?  What do you mean in your
recommendations when you say to "always pair tubes".  I was lost at this
point.

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Steve Evett    srevett@ag.gov   http://www.cprl.ars.usda.gov/ USDA-ARS,
P.O. Drawer 10, 2300 Experiment Station Road
Bushland, Texas 79012.  Tel:806.356.5775  FAX:806.356.5750
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